What might result from damaged or missing shingles on a roof?

Damaged or missing shingles on a roof can lead to significant issues, primarily concerning the integrity of the roofing system and the protection it provides to the underlying structures of a building. When shingles are compromised, they can no longer effectively shed water and protect against the elements. This situation increases the likelihood of leaks occurring, which can allow water to penetrate into the roof structure and eventually lead to water damage within the interior of the building. The resulting damage can manifest as stained ceilings, mold growth, and structural deterioration, all of which can require expensive repairs.

While it's true that missing shingles will not improve insulation efficiency or airflow, these scenarios are less likely to be direct consequences of shingle issues compared to leaks and water damage. Higher energy bills might be a secondary effect due to compromised insulation or increased heating and cooling demands, but they are not as immediate or direct as the risk of leaks and subsequent water damage.